I've never understood the fascination with all the high tech machines. They're more expensive and more complicated than something everyone already knows works the best: picking heavy things up and putting them down again.

Difficult to pick up heavy things with certain muscles, like the triceps, without a pulley system.

Anyway, I do think p90x basically consists of listing heavy things.

Sorry, in re-reading my comment I kind of sounded like a jerk - I promise, it was unintentional.

I guess my point was that you can do a heck of a lot for yourself with basic situps / pushups / floor squats with a bag full of books or sand and it doesn't take anything that requires payments to do so.

A machine does two things.

(1) It sits there and says "you spent $500 - are you going to use it?"

(2) It sits there and gives you another place to hang junk.

If (1) works for you, great.

BTW - These are two reasons why the "put under your bed" machines are a bad idea. Out of sight, out of mind.

a. Machines are easier.

b. Machines develop muscles to show at the expense of muscles for function.

Human nature.

I suspect the largest portion of the truth derives from point B.